I like supporting the little guys so I signed up for ViaTalk after SunRocket dumped me. Before VOIP I was using Cavalier instead of Verizon.
I can't comment too much on the ViaTalk quality since I just got it working last night but if you sign up use my referral code. 51164 :-) Sorry. I figured it was worth a try and my Gizmo reconfiguration notes may save you time.
I'll post more details on trying to get 27 months of ViaTalk for $200 and my number porting progress soon.
ViaTalk was giving 2 years of service for $200 but they switched it to 15 months and up to 12 additional months for people coming from SunRocket. One operator said I would get 27 months but another made it sound like they would buy out the time I have left with SunRocket.
Either way this is the best deal out there. I hope they stay in business.